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Battery core of spiral lithium ion battery, and spiral lithium ion battery

A lithium battery, wound-type technology, applied in the direction of non-aqueous electrolyte battery electrodes, secondary batteries, electrode carriers/collectors, etc., can solve the problem of uneven current distribution of wound-type lithium battery cells, and solve the problem of current Effects of uneven distribution, lower internal resistance, and smaller thickness of collector plate

Inactive Publication Date: 2012-02-08
XIANGTAN YINHE NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art, effectively solve the problem of uneven current distribution of the winding type lithium battery cell, and provide a winding type lithium battery cell and a winding type lithium battery with small internal resistance of the battery. type lithium battery

Method used

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  • Battery core of spiral lithium ion battery, and spiral lithium ion battery
  • Battery core of spiral lithium ion battery, and spiral lithium ion battery
  • Battery core of spiral lithium ion battery, and spiral lithium ion battery

Examples

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Embodiment Construction

[0032] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] Such as Figure 5 , Figure 6 , Figure 7 As shown, the cell of the wound lithium battery of the present invention is cylindrical, including a positive electrode sheet 4 , a negative electrode sheet 5 , a separator 6 , a positive electrode current collector 7 and a negative electrode current collector 8 . Such as image 3 As shown, the upper end of the positive electrode sheet 4 is provided with an uncoated blank strip 41; Figure 4 As shown, the lower end of the negative electrode sheet 5 is provided with an uncoated blank strip 51; after the positive electrode sheet 4 and the negative electrode sheet 5 are separated and wound by a separator 6, the lower surface of the positive electrode current collector plate 7 and the blank strip forming a circle on the positive electrode sheet 4 The upper surface of the negative electrode current collec...

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Abstract

The invention discloses a battery core of a spiral lithium ion battery, and a spiral lithium ion battery containing the battery core. The spiral lithium ion battery comprises a battery housing, and a spiral battery core and a battery upper cap positioned in the battery housing. The battery core comprises an anode sheet, a cathode sheet, a separating film, an anode flow concentrating plate, and a cathode flow concentrating plate. The upper end of the anode sheet and the lower end of the cathode sheet are provided with uncoated blank bands. After the anode sheet and the cathode sheet are separated by using the separating film and are rolled, the lower surface of the anode flow concentrating plate firmly contacts the circular blank band formed on the anode sheet, and the upper surface of the cathode flow concentrating plate firmly contacts the circular blank band formed on the cathode sheet. The anode flow concentrating plate is electrically connected to the upper cap of the battery. The cathode flow concentrating plate is electrically connected to the housing. The battery provided by the invention is advantaged in small internal resistance, uniformly distributed current, and long service life. The battery is especially suitable for power batteries of electric cars and the like.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a battery core of a winding lithium battery and a winding lithium battery. Background technique [0002] The types of batteries used as energy storage components include lead-acid batteries, nickel-metal hydride batteries, lithium batteries, etc. The price of lead-acid batteries is the lowest, and its disadvantage is that the specific volume is small, that is to say, under the same capacity, the weight and volume of the battery are large , the charge and discharge efficiency is low, and the life is short; the specific volume of the Ni-MH battery is much better than that of the lead-acid battery, the life of the single battery is also better, and its high-current charge and discharge characteristics are also better than the lead-acid battery, but compared with the lithium battery , the cost of its raw materials is on the rise; the specific capacity of lithium batteries is better than that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M4/13H01M4/80
CPCY02E60/10Y02P70/50
Inventor 唐菊香
Owner XIANGTAN YINHE NEW ENERGY
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